Any 9MM problems > Rimfire and Pistol Calibers

Posted: 6/12/2015 5:04:25 AM EDT

Are there any problems with running a 9MM upper with ramped bolt on a dedicated receiver M16?

Posted: 6/12/2015 5:35:13 AM EDT

[#1]

The only problem I ever had was an ejection issue - after tweaking the ejector it went away.

Posted: 6/12/2015 6:41:17 AM EDT

[#2]

Also, keeping it fed. Hungry lil' bastids!

In all seriousness, if you're talking a full auto M16 lower, I'd be worried the 9mm would beat up that lower.

Posted: 6/12/2015 8:47:11 AM EDT

[#3]

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Quoted:

Also, keeping it fed. Hungry lil' bastids!

In all seriousness, if you're talking a full auto M16 lower, I'd be worried the 9mm would beat up that lower.

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Agreed. Although I'm normally not a fan I'd probably be looking at some FCG saving parts like KNS pins.

Then again I don't own a MG so I don't have to worry about these things...

Posted: 6/12/2015 12:33:44 PM EDT

[#4]

Quote History

Quoted:
The only problem I ever had was an ejection issue - after tweaking the ejector it went away.

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I had to bend this one in about .050

Posted: 6/13/2015 4:36:52 AM EDT

[#5]

Thanks-I was/am worried about egging my receiver with a 9MM upper. I have a Geissele trigger which recommends against the KNS pins.

Posted: 6/13/2015 12:39:43 PM EDT

[#6]

Quote History

Quoted:
Thanks-I was/am worried about egging my receiver with a 9MM upper. I have a Geissele trigger which recommends against the KNS pins.

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I don't understand this recommendation. Why does the company advise against the use of a product that keeps the pins from moving? Are the Geissele pins somehow designed to not move or spin? Serious question.

Posted: 6/13/2015 7:07:11 PM EDT

[#7]

I think it's not that they don't recommend the KNS pins, they feel their hardened SS pins are superior to KNS pins when using a Geissele trigger.

Posted: 6/14/2015 4:47:56 AM EDT

[#8]

That's basically it but they do recommend against them. They say they are too soft and prone to breaking.

Posted: 6/14/2015 4:50:37 AM EDT

[#9]

Yep full auto so it does concern me after doing some more reading. A shame because I have a 7.5" 9MM upper that I can't use on my SBR because of MD's stupid new laws. SBR has to be min 20" OAL. The M16 would be exempt.

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